1 Structure IDs- Arm (Muscles/Ligaments)

Question 1

Ulnar collateral

Answer 1

Function: resists excessive cubital valgus

Attachments: from medial epicondyle to medial margin of coronoid process and olecranon process

Question 2

Radial collateral

Answer 2

Function: resists excessive cubital varus

Attachments: from lateral epicondyle to annular ligament

Question 3

Annular

Answer 3

Function: stabilizes proximal radioulnar joint

Attachments: from the anterior margin of the radial notch to posterior margin of radial notch surrounding head of radius

Question 4

Interosseous membrane

Answer 4

Attachments: from interosseous border of radius to interosseous border of ulna

Question 5

Anconeus (C7-8)

Answer 5

Attachments: from lateral epicondyle of humerus to lateral surface of the olecranon process

Actions: extension of elbow

Innervation: radial nerve

Question 6

Biceps brachii (C5-6)

Answer 6

Attachments: from coracoid process (short head) and supraglenoid tubercle (long head) of the scapula to the radial tuberosity and the deep antebrachial fascia (through the bicipital aponeurosis)

Actions: flexion of the shoulder and elbow, supination of the forearm

Innervation: musculocutaneous

Question 7

Brachialis (C5-6)

Answer 7

Attachments: from the distal anterior shaft of the humerus and lateral and medial intermuscular septa to the coronoid process and ulnar tuberosity

Actions: flexion of the elbow

Innervation: musculotaneous and small branch from radial nerve

Question 8

Coracobrachialis (C6-7)

Answer 8

Attachments: from the coracoid process to the proximal medial shaft of the humerus

Actions: flexion and adduction of the shoulder

Innervation: musculocutaneous nerve

Question 9

Triceps brachii (C6-T1)

Answer 9

Attachments: from the infraglenoid tubercle of the scapula (long head) and proximal posterolateral (lateral head) and distal posteromedial (medial) shaft of the humerus to the olecranon process of the ulna

Actions: extension of the shoulder (long head) and extension of the elbow (long, lateral and medial heads)

Innervation: radial nerve